Avoid string copies when determining approximate memory usage in RDHI

content/browser/loader/resource_dispatcher_host_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 2176 matching lines @@
 
   // Flush all the pending requests.
   while (net::URLRequestTestJob::ProcessOnePendingMessage()) {}
 }
 
 // Test the private helper method "CalculateApproximateMemoryCost()".
 TEST_P(ResourceDispatcherHostTest, CalculateApproximateMemoryCost) {
   net::URLRequestContext context;
   std::unique_ptr<net::URLRequest> req(context.CreateRequest(
       GURL("http://www.google.com"), net::DEFAULT_PRIORITY, NULL));
-  EXPECT_EQ(
-      4427,
-      ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(req.get()));
+  EXPECT_EQ(4425, ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(
+                      req.get()));
 
   // Add 9 bytes of referrer.
   req->SetReferrer("123456789");
-  EXPECT_EQ(
-      4436,
-      ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(req.get()));
+  EXPECT_EQ(4434, ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(
+                      req.get()));
 
   // Add 33 bytes of upload content.
   std::string upload_content;
   upload_content.resize(33);
   std::fill(upload_content.begin(), upload_content.end(), 'x');
   std::unique_ptr<net::UploadElementReader> reader(
       new net::UploadBytesElementReader(upload_content.data(),
                                         upload_content.size()));
   req->set_upload(
       net::ElementsUploadDataStream::CreateWithReader(std::move(reader), 0));
 
   // Since the upload throttling is disabled, this has no effect on the cost.
-  EXPECT_EQ(
-      4436,
-      ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(req.get()));
+  EXPECT_EQ(4434, ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(
+                      req.get()));
 }
 
 // Test that too much memory for outstanding requests for a particular
 // render_process_host_id causes requests to fail.
 TEST_P(ResourceDispatcherHostTest, TooMuchOutstandingRequestsMemory) {
   // Expected cost of each request as measured by
   // ResourceDispatcherHost::CalculateApproximateMemoryCost().
   int kMemoryCostOfTest2Req =
       ResourceDispatcherHostImpl::kAvgBytesPerOutstandingRequest +
       net::URLRequestTestJob::test_url_2().spec().size() + sizeof("GET") - 1;
@@ skipping 1612 matching lines @@
   return nullptr;
 }
 
 INSTANTIATE_TEST_CASE_P(
     ResourceDispatcherHostTests,
     ResourceDispatcherHostTest,
     testing::Values(TestConfig::kDefault,
                     TestConfig::kOptimizeIPCForSmallResourceEnabled));
 
 }  // namespace content